Witchy tools: athame.
An athame is a ceremonial dagger with a double-edged blade and (usually) a black handle. It is normally used by Wiccans, though other witchcraft traditions outside that religion may use one.
It represents one of the four elemental tools in Wicca (in this case, fire). This tools' primary use is energy work. It is not used for cutting (there is another knife for that use). This tool also aids in the creating of a magic circle. Another one of its uses is to invoke the guardians of the four directions. The athame, being a phallic symbol, is also used to represent the masculine in fertility ceremonies.